112345-60-5Relevant articles and documents
Synthesis of carba-NAD and the structures of its ternary complexes with SIRT3 and SIRT5
Szczepankiewicz, Bruce G.,Dai, Han,Koppetsch, Karsten J.,Qian, Dongming,Jiang, Fan,Mao, Cheney,Perni, Robert B.
, p. 7319 - 7329 (2012)
Carba-NAD is a synthetic compound identical to NAD except for one substitution, where an oxygen atom adjacent to the anomeric linkage bearing nicotinamide is replaced with a methylene group. Because it is inert in nicotinamide displacement reactions, carba-NAD is an unreactive substrate analogue for NAD-consuming enzymes. SIRT3 and SIRT5 are NAD-consuming enzymes that are potential therapeutic targets for the treatment of metabolic diseases and cancers. We report an improved carba-NAD synthesis, including a pyrophosphate coupling method that proceeds in approximately 60% yield. We also disclose the X-ray crystal structures of the ternary complexes of SIRT3 and SIRT5 bound to a peptide substrate and carba-NAD. These X-ray crystal structures provide critical snapshots of the mechanism by which human sirtuins function as protein deacylation catalysts.